Statistics

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Reply 1

Swayum

One thing you can do is calculate the standard deviation for each of the 7 concentrations. The standard deviation tells you how spread out a set of numbers are. So like 1, 6, 90, 105 are pretty spread out so would have a high standard deviation, where as 4, 6, 8, 7 aren't very spread out so you'd expect a low standard deviation. How does it relate to your experiment? You can claim that if the 5 values for each concentration have a low standard deviation then the experiment must have been carried out well/the results are reliable.

If all the standard deviations come out low, I'd recommend making up a statistic which clearly doesn't belong (like a really high number). Then you can say that that particular statistic is an outlier, which you can "prove" by working the standard deviation with that statistic included and the standard deviation with that statistic removed. If the standard deviation with it removed gets reduced a lot, it shows that maybe that statistic doesn't really belong.

This should give you high quantitative analysis marks

So how do you calculate it? http://easycalculation.com/statistics/standard-deviation.php